Improved mandfaotdee of acid phosphates to be used in food



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EBEN N. 'HORSF-ORD, OF CAMBRIDGE, MASSACHUSETTS.

Letters Patent No. 75.272. dated March 10,- 1868.

IMPROVED MANUFACTURE OF ACID PHOSPHA'I'ES TO BE USED IN FOOD.

TO ALL WHOM IT MAY CON CERN:

Be it known that I, EDEN N. Housman, oi the city of Cambridge,,in the county of Middlesex, and State of Massachusetts, have invented a. new and useful Improvement in the Introduction of Phosphates into Food and I do hereby declare that the following is a full and exact description thereof.

vMy invention consists in the use of acid phosphate of'lime, magnesia, or alkali, as a. condiment, in liqhid form, either by itself or as a substitute for vinegar, or an'ingredient in a beverage or eeuce, or for other cullnary or' sanitary purposes, where it is desirable to employ an acid in liquid form, v

ThgimportanceLof phosphates to the animal economy, to be supplied through the food,- has long been recogni-zod. I huve'found the advantage to the health, of using theliquid monobasic ncid phosphate, when employed in aid of digestion and assimilation, to be of the most marked character.- Dyspepsia of certain forms is relieved by ti hing with-the meals a teaspoonful of the liquid acid phosphate,'of specific gravity 1.17, in a glass of water. It may be used as vinegur,'when'I dilute'the aoid of the above strength with five times its 'volum,e of water, for ordinary household consumption. It may be employed as an ingredient in beverages, taking 'thc'plncc of lcmomjuice, on long voyages, to preventthe ill effects arising from the too long use of salt' provisions, by supplying the phosphates of which the ments have been deprived; or it may be used as an ingredient in producing an eflervescing draught, or in the composition of sauces; or, when mixed with flour, as a substitute for hydrochloric acid, in the process of Thompson, for decomposing bicarbonate of soda, inmalring bread light without the use of ferment.

The acid phosphate I employ is generally a. compound of one atom of lime with one atoui of phosphoric acid, with a. small addition of free phosphoric. acid, and is prepared as follows: v I

I add to tribasic phosphate oflime, sulphuric acid, in the proportions described in my putcnt's for producing acid phosphate of lime, for use in preparing self-raising flour, being about fourteen hundred parts of burned "bones to -one thousand parts of oil of'vitriol. The sulphuric acid withdraws a. little more them two atoms of lime from the phosphate, leaving monohssic-ph'osphatc of lime and o-small proportion of free phosphoric -acid in solution, but mixed with gypsum. The solution is separated from the gypsum'hy l'enching'. I take th eliquo r thus separated as long'ns it runs of a specific gravity that will average 1.17. I do not propose to limit myself to this strength,.nor to these proportions, but it is convenient to have a constant strength, and I have found this strength and the above proportions convenient for production in a large way.

This liquid may be kept in glass or stoneware. In this form it is ready for use, .or to be diluted to fit it for use where less strength is desired. Diluted with, twenty times its volume of, water, it may be employed to remove tartar from teeth, without injury to the enamel. It'operntes both as a 'very week acid, and specifically to destroy traces of food lodged 'in the insterstices between. the teeth.

I In suiting the acid phosphate of lime to the rants obove alluded to, the constant specific gravity of the liquid will be a guide. The acid phosphate of lime may be substantially replaced by the corresponding compounds of magnesia and potassa. 9r soda, produced by the usual well-known chemical methods.

What I claim, and desire to secure by Letters Patent of theUnited States, is-

The manufacture of liquid acid phosphate of lime, for use as a condiment or article of diet, or ingredient to be employed in beverages or food, substantially us and for the purposes herein set forth.

E. N." HORSFORD.

Witnesses:

A. POLLOK, Eon. F. BnowN. 

